JDS Uniphase SB Series, Руководство пользователя

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Programming Guide – 26
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A command is contained in a message, and messages can contain more than one
command, each one separated by a semicolon (;). For example, CLOSE 6;XDR 2 1 <CR>
<LF> contains two commands.
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All GPIB commands must end with the terminating sequence <CR> <LF>.
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All RS232 commands must be terminated with a single <CR> character.
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The input buffer of the switch can hold as many as 100 characters. If the buffer becomes
full, the switch holds the handshaking line on the GPIB interface until space is available.
Similarly, over the RS232 interface, the switch sets the Clear To Send line low. Any
characters received after the line goes low are ignored.
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Commands are executed as they are parsed; consequently, a command can be executed
before the entire message in which it is contained is received.
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The switch delays accepting new characters sent over the GPIB interface while the switch
mechanism is moving, but no data are lost. The SB switch is always ready to accept
characters over the RS232 interface.
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A query command is used to extract status information from the switch. For example,
SRE? <CR> <LF> returns the contents of the status register.
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Multiple-command messages can contain only one query command. A query must be the
last command in the message, for example, CLOSE 20; XDRS? <CR> <LF>.
Operation Commands
RESET Reset
Returns the switch to the power-up state, for example, channel 0, relay drivers off.
CLOSE i Set Optical Channel
Closes the optical path represented by the integer i.
XDR i k Driver Control
Sets the specified external driver on or off.
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i = driver number (1 to 8)
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k = 1 (on)
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k = 0 (off)